Correct usage of stack.values([accessor]) in D3 Streamgraph?

Question

I am trying to create a D3 streamgraph chart with additional data per layer using a values accessor, as demonstrated in the D3 API reference and this question at Stack Overf

Answer 1

The stack layout knows the values accessor you've specified, but the area generator does not. So, you have to pass d.values rather than d to the area generator, like so:

.attr("d", function(d) { return area(d.values); })